Thanks to increasing demand and upcoming U.S. sanctions against Iran, oil prices have been rising and some analysts are forecasting that they will surge even higher in the months ahead. Unfortunately, that would be very bad news for the U.S. economy at a time when concerns about a major economic downturn have already been percolating. In recent years, extremely low gasoline prices have been one of the factors that have contributed to a period of relative economic stability in the United States. Because our country is so spread out, we import such a high percentage of our goods, and we are so dependent on foreign oil, our economy is particularly vulnerable to gasoline price shocks. Anyone that lived in the U.S. during the early 1970s can attest to that. If the average price of gasoline rises to $4 a gallon by the end of 2018 that will be really bad news, and if the average price of gasoline were to hit $5 a gallon that would be catastrophic for the economy.

Very early on Tuesday, the price of U.S. oil surged past $70 a barrel in anticipation of the approaching hurricane along the Gulf Coast. The following comes from Fox Business…

U.S. oil prices rose on Tuesday, breaking past $70 per barrel, after two Gulf of Mexico oil platforms were evacuated in preparation for a hurricane.

U.S. West Texas Intermediate (WTI) crude futures were at $70.05 per barrel at 0353 GMT, up 25 cents, or 0.4 percent from their last settlement.

If we stay at about $70 a gallon, that isn’t going to be much of a problem.

But some analysts are now speaking of “an impending supply crunch”, and that is a very troubling sign. For example, just check out what Stephen Brennock is saying…

“Exports from OPEC’s third-biggest producer are falling faster than expected and worse is to come ahead of a looming second wave of U.S. sanctions,” said Stephen Brennock, analyst at London brokerage PVM Oil Associates. “Fears of an impending supply crunch are gaining traction.”

So how high could prices ultimately go?

Well, energy expert John Kilduff is now projecting that we could see the price of gasoline at $4 a gallon by winter…

Energy expert John Kilduff counts Iran sanctions as the top reason West Texas Intermediate (WTI) could climb as much as 30 percent by winter, and that could spell $4 a gallon unleaded gasoline at the pumps.

“The global market is tight and it’s getting tighter, and the big strangle around the market right now is what’s in the process of happening with Iran and the Iran sanctions,” the Again Capital founding partner said on CNBC’s “Futures Now.”

About two months from now, U.S. sanctions will formally be imposed on Iran, and that is going to significantly restrict the supply of oil available in the marketplace.

So refiners that had relied on Iranian oil are “scrambling” to find new suppliers, and this could ultimately drive oil prices much higher…

Iran’s oil exports are plummeting, as refiners scramble to find alternatives ahead of a re imposition of U.S. sanctions in early November. That in turn has helped drain a glut of unsold oil.

“To the extent we’re seeing the Iran barrels lost to the market, you’re looking at a WTI price and Brent in the $85 to $95 range, potentially,” Kilduff said.

Please do not underestimate the impact of the price of oil. It shot above $100 a barrel in 2008, and it was one of the factors that precipitated the financial crisis later that year.

Now we are rapidly approaching another crisis point, and there are so many wildcards that could potentially cause major problems.

One of those wildcards that I haven’t even talked about in this article would be a major war in the Middle East. One of these days it will happen, and the price of oil will instantly soar to well above $100 a barrel.

We live at a time of rising global instability, and we should all learn to start expecting the unexpected.